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Table 4

ANOVA analysis for the EC treatment

VariableUV254DOCTurbidityPhenol
R2 0.99 0.99 0.99 0.97 
R2 adjusted 0.98 0.98 0.98 0.95 
Regression (degree of freedom − 14) 
 Sum of squares 2,775.86 3,602.24 2,568.55 3,085.7 
 Mean square 198.28 257.3 183.47 220.41 
P-value <0.0001 <.0001 <0.0001 <.0001 
F-value 123.96 119.59 101.34 41.59 
Lack of fit (degree of freedom − 10) 
 Sum of squares 20.64 22.27 23.91 77.34 
 Mean squares 2.06 2.23 2.39 7.73 
P-value of lack of fit 0.11 0.48 0.08 0.002 
F-value of lack of fit 3.08 1.11 3.68 17.86 
Pure error (degree of freedom − 05) 
 Sum of squares 3.35 10 3.25 2.17 
 Mean square 0.67 0.65 0.43 
 Coefficient of variance (CV) % 1.61 2.04 1.68 3.16 
 Standard deviation 1.26 1.47 1.35 2.30 
VariableUV254DOCTurbidityPhenol
R2 0.99 0.99 0.99 0.97 
R2 adjusted 0.98 0.98 0.98 0.95 
Regression (degree of freedom − 14) 
 Sum of squares 2,775.86 3,602.24 2,568.55 3,085.7 
 Mean square 198.28 257.3 183.47 220.41 
P-value <0.0001 <.0001 <0.0001 <.0001 
F-value 123.96 119.59 101.34 41.59 
Lack of fit (degree of freedom − 10) 
 Sum of squares 20.64 22.27 23.91 77.34 
 Mean squares 2.06 2.23 2.39 7.73 
P-value of lack of fit 0.11 0.48 0.08 0.002 
F-value of lack of fit 3.08 1.11 3.68 17.86 
Pure error (degree of freedom − 05) 
 Sum of squares 3.35 10 3.25 2.17 
 Mean square 0.67 0.65 0.43 
 Coefficient of variance (CV) % 1.61 2.04 1.68 3.16 
 Standard deviation 1.26 1.47 1.35 2.30 
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